Question 697451
x= 	cost per hour sander							
y=	cost per hour polisher							
Total  sold								
5	x	+	5	y	=	50	.............1	
								
4	x	+	8	y	=	56	.............2	
Eliminate	y							
multiply (1)by		-8						
Multiply (2) by		5						
-40	x		-40	y	=	-400		
20	x	+	40	y	=	280		
Add the two equations								
-20	x				=	-120		
/	-20							
x	=	6						
plug value of			x	in (1)				
5	x	+	5	y	=	50		
30		+	5	y	=	50		
			5	y	=	50		-30
			5	y	=	20		
				y	=	4		
	$6		cost per hour sander					
	$4		cost per hour polisher					
m.ananth@hotmail.ca